臥式靜電除塵器是眾多除塵器當中的一種,臥式靜電除塵器是以靜電凈化法來收捕廢氣中的粉塵的設備,其主要是讓含塵氣體進人氣刺叭時,含塵氣體受到氣流分布板以及折流板的調整后,使氣流能較均勻地進人電場。
臥式靜(jing)電(dian)(dian)(dian)(dian)除塵(chen)(chen)器是以(yi)靜(jing)電(dian)(dian)(dian)(dian)凈化法來(lai)收捕廢氣(qi)中的(de)粉(fen)塵(chen)(chen),它的(de)凈化工(gong)作上(shang)要是依靠電(dian)(dian)(dian)(dian)暈極(ji)和(he)沉淀兩個系(xi)統來(lai)完(wan)成的(de),當含(han)塵(chen)(chen)氣(qi)體(ti)(ti)(ti)(ti)進(jin)(jin)人(ren)(ren)氣(qi)刺(ci)叭(ba)時,含(han)塵(chen)(chen)氣(qi)體(ti)(ti)(ti)(ti)受到氣(qi)流(liu)(liu)(liu)分(fen)(fen)布板以(yi)及折(zhe)流(liu)(liu)(liu)板的(de)調(diao)整后(hou),使氣(qi)流(liu)(liu)(liu)能(neng)較(jiao)(jiao)均勻地進(jin)(jin)人(ren)(ren)電(dian)(dian)(dian)(dian)場(chang)。在(zai)橫斷面擴大的(de)作用(yong)下,氣(qi)流(liu)(liu)(liu)速度(du)迅速降(jiang)低,其(qi)中有(you)些較(jiao)(jiao)重(zhong)的(de)塵(chen)(chen)粒便失去速度(du)而沉降(jiang)下來(lai)。進(jin)(jin)人(ren)(ren)電(dian)(dian)(dian)(dian)場(chang)的(de)含(han)塵(chen)(chen)氣(qi)體(ti)(ti)(ti)(ti)由于(yu)電(dian)(dian)(dian)(dian)暈極(ji)通人(ren)(ren)高(gao)(gao)壓直流(liu)(liu)(liu)電(dian)(dian)(dian)(dian),則在(zai)電(dian)(dian)(dian)(dian)暈極(ji)附(fu)近產(chan)生電(dian)(dian)(dian)(dian)暈現象,使氣(qi)體(ti)(ti)(ti)(ti)電(dian)(dian)(dian)(dian)離(li),電(dian)(dian)(dian)(dian)離(li)后(hou)的(de)氣(qi)體(ti)(ti)(ti)(ti)中存在(zai)大量的(de)電(dian)(dian)(dian)(dian)子和(he)離(li)子,這些電(dian)(dian)(dian)(dian)子和(he)離(li)子與進(jin)(jin)人(ren)(ren)電(dian)(dian)(dian)(dian)場(chang)的(de)粉(fen)塵(chen)(chen)結合(he)起來(lai),使塵(chen)(chen)粒帶(dai)電(dian)(dian)(dian)(dian),帶(dai)電(dian)(dian)(dian)(dian)塵(chen)(chen)粒在(zai)電(dian)(dian)(dian)(dian)場(chang)力的(de)作用(yong)下趨向(xiang)本設備(bei)陽極(ji)(正極(ji)、本設備(bei)采用(yong)負高(gao)(gao)壓制)和(he)陰(yin)(yin)極(ji)(負極(ji)) , 釋放出電(dian)(dian)(dian)(dian)子分(fen)(fen)別(bie)沉積在(zai)相應的(de)電(dian)(dian)(dian)(dian)極(ji)上(shang),通過(guo)設備(bei)陰(yin)(yin)陽極(ji)振打(da)系(xi)統的(de)振打(da),使沉積在(zai)陰(yin)(yin)陽電(dian)(dian)(dian)(dian)極(ji)上(shang)的(de)粉(fen)塵(chen)(chen)振落,進(jin)(jin)人(ren)(ren)集灰斗 通過(guo)排(pai)(pai)灰裝置放出,回(hui)收有(you)物(wu)料,被)凈化的(de)氣(qi)體(ti)(ti)(ti)(ti)排(pai)(pai)入大氣(qi)。
工作原理
靜電(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)器的(de)(de)工(gong)作原理(li)是利用高(gao)壓(ya)電(dian)(dian)(dian)(dian)(dian)場使(shi)煙(yan)氣發生電(dian)(dian)(dian)(dian)(dian)離(li),氣流(liu)(liu)(liu)中的(de)(de)粉塵(chen)(chen)(chen)(chen)(chen)荷(he)電(dian)(dian)(dian)(dian)(dian)在電(dian)(dian)(dian)(dian)(dian)場作用下與氣流(liu)(liu)(liu)分離(li)。負(fu)極(ji)由不同(tong)斷面形(xing)狀(zhuang)的(de)(de)金(jin)屬導線制(zhi)成,叫(jiao)放電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)極(ji)。正極(ji)由不同(tong)幾何(he)形(xing)狀(zhuang)的(de)(de)金(jin)屬板制(zhi)成,叫(jiao)集(ji)(ji)塵(chen)(chen)(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)。靜電(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)器的(de)(de)性能受粉塵(chen)(chen)(chen)(chen)(chen)性質、設備構造和(he)煙(yan)氣流(liu)(liu)(liu)速等三個因素的(de)(de)影響(xiang)。粉塵(chen)(chen)(chen)(chen)(chen)的(de)(de)比(bi)電(dian)(dian)(dian)(dian)(dian)阻(zu)是評價(jia)導電(dian)(dian)(dian)(dian)(dian)性的(de)(de)指標,它對除塵(chen)(chen)(chen)(chen)(chen)效率有直接(jie)的(de)(de)影響(xiang)。比(bi)電(dian)(dian)(dian)(dian)(dian)阻(zu)過低,塵(chen)(chen)(chen)(chen)(chen)粒(li)難以(yi)保持在集(ji)(ji)塵(chen)(chen)(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)上(shang),致(zhi)使(shi)其重(zhong)返氣流(liu)(liu)(liu)。比(bi)電(dian)(dian)(dian)(dian)(dian)阻(zu)過高(gao),到達集(ji)(ji)塵(chen)(chen)(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)的(de)(de)塵(chen)(chen)(chen)(chen)(chen)粒(li)電(dian)(dian)(dian)(dian)(dian)荷(he)不易放出,在塵(chen)(chen)(chen)(chen)(chen)層之間形(xing)成電(dian)(dian)(dian)(dian)(dian)壓(ya)梯(ti)度會產生局部(bu)擊穿和(he)放電(dian)(dian)(dian)(dian)(dian)現象。這(zhe)些情況都會造成除塵(chen)(chen)(chen)(chen)(chen)效率下降。
電(dian)除塵(chen)器(qi)的(de)基(ji)本原理(li)是利用電(dian)力捕集煙氣中的(de)粉(fen)(fen)塵(chen),主要包(bao)括以下四(si)個相互有關的(de)物理(li)過程: (1) 氣體(ti)的(de)電(dian)離。(2) 粉(fen)(fen)塵(chen)的(de)荷電(dian)。(3) 荷電(dian)粉(fen)(fen)塵(chen)向電(dian)極移動。(4) 荷電(dian)粉(fen)(fen)塵(chen)的(de)捕集。